| [GMCnet] Fwd: A week to go to our Yellowstone Trip [message #254208] |
Wed, 02 July 2014 23:07  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Senior Member |
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Jon,
So sorry to hear all your woes. It's going to get better!
The long pole in the tent right now seems to be the brake problem. Here's
my diagnosis: On one of your brake pads, the friction material separated
from the metal base. That left you with no brakes until you pumped the MC
enough to extend the piston on the caliper with the lost pad. When the
metal base reached the disc, you got brakes back -- but with metal-to-metal
contact. I'm hoping you'll be able to merely replace the front pads and
have your brakes back. Even the scored disc may be useable. If not, I'm
sure someone can overnight a replacement disc to you. Sure hope my
diagnosis is correct. If so, let us know the source of the failed pad.
As far as the weak fuel pump, I'd try installing an external pump just
ahead of the main tank to see if it's possible to pull through the in-tank
pump (whose wire I'd transfer to that external pump). If so, carry on. If
it can't pull through the installed pump, I'd keep the external pump as a
spare and still carry on, using the Aux tank only -- after all, you'll only
be about 6 gallons short of a "full fuel load". Just stop more often. I
wouldn't delay my trip just to pull the tank. (But when I got back I'd
certainly make sure that could never happen to me again -- just as I've
done by avoiding the temptation to install in-tank pumps.)
If you've been here long, you know I'm well experienced at unexpected
problems. Don't let them get you down -- the end result is worth the
trouble.
Good Luck!
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Wed, Jul 2, 2014 at 9:49 PM, Jon Payne wrote:
> So here we are one week until our long awaited family trip out west in
> our GMC and she is falling apart!
>
...
> It gets better....This morning I took the GMC back to the shop to have it
> serviced after the hose was replaced. As I left the driveway I had no
> brakes and the brake light came on.I pumped it up several times and
> immediately got full pedal back. WTF. Note, everything from the MC to the
> rear
> brakes replaced 3 years ago (~3.5K miles). Okay I have the brakes back
> and the shop is 3 miles from the house so I'm pressing on. On my way to the
> shop the engine starts to sputter under acceleration. If I floored it the
> engine would stall....NOW WHAT! I switched to AUX and the problem went
> away
> (I installed in tank fuel pumps this spring). Hmmm...sounds like the
> main fuel pump took a crap. Oh great.
> ...
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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